Fmod Cables have the same color code but the direction determines the frequency. The color dot on the side where the wires connect to the amplifier shows the frequency. The black housing indicates low pass and the red housing indicates high pass.

Bass blockers have a dot on the red output cable.

Color code for FMOD Cables ™

LOW PASS Black Label HIGH PASS Red Label

Two color dots for each Fmod Cable since dual crossover frequencies are available depending on direction of installation. See colors below.